package com.fulu.javabase.arithmetic;

public class BitMapTest {

    // 有40亿qq，去重
    public static void qqDistinct(){
        byte[] bytes = new byte[]{};
        int[] qqs = new int[]{123,234,345,456,234,456};
        //bytes[0] 8bit
        int index = 123 >> 3;
        System.out.println(123 & 0x07);
    }

    public static void main(String[] args) {
        qqDistinct();
    }
}
